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what car.
what year.
must we guess basics facts?
or post the VIN?
some cars have HLA, and no lash.
why ask? rumor. or operator guide said to....at 60kmiles.
or they make noise.
just give a hint as to way you worry this......????????

good question, if stock car, 1984 jeep what?
just 1 post so no me cheating to find name of jeep.
year and told engine size, but no jeep model. what car is this?

this is covered all jeep forums.
and in the FSM.
if in the USA, open hood, look up under see that EPA sticker
and the spark timing, (can be diffr, for Calif cars. thus the sticker)
timing varies on export models too.

not sold in USA, 2.4 liter C240 diesel engine
this is USA forum (calif)
you'd best post to a forum that has this truck.
for best help. just saying...
join a real isuzu forum google just like that.
or go to your isuzu dealer and buy the book on that engine. works.

no car stated. (of truck if is one)
no year,
no model car, or truck.
no country stated.
you do know that all online data is INDEXed by that , right.
starting with YEAR.
so my challenge is to look it up with no input from you.
this is a USA forum and our isuzu dealers sell only these huge NPR heavy trucks hear.

but if you google that engine you might luck out or get wrong info.
why trust the whole engine on internet rumor, is my answer.